11010212121121 has 8 divisors (see below), whose sum is σ = 11242504377864. Its totient is φ = 10780121687040.

The previous prime is 11010212121059. The next prime is 11010212121149. The reversal of 11010212121121 is 12112121201011.

It can be written as a sum of positive squares in 4 ways, for example, as 226705490496 + 10783506630625 = 476136^2 + 3283825^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11010212121121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11010212121095 and 11010212121104.

It is not an unprimeable number, because it can be changed into a prime (11010212121191) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 550445560 + ... + 550465561.

It is an arithmetic number, because the mean of its divisors is an integer number (1405313047233).

Almost surely, 2^{11010212121121} is an apocalyptic number.

It is an amenable number.

11010212121121 is a deficient number, since it is larger than the sum of its proper divisors (232292256743).

11010212121121 is a wasteful number, since it uses less digits than its factorization.

11010212121121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100911331.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 11010212121121 its reverse (12112121201011), we get a palindrome (23122333322132).

The spelling of 11010212121121 in words is "eleven trillion, ten billion, two hundred twelve million, one hundred twenty-one thousand, one hundred twenty-one".